Table · collection · 2025
Diode Laser Hygrometer (DLH) IMPACTS
Listed in NASA Earthdata CMR and NASA Data Portal — shown once because both records carry DOI 10.5067/impacts/dlh/data101
The Diode Laser Hygrometer (DLH) dataset is comprised of water vapor mixing ratio measurements as well as relative humidities (both concerning liquid water and ice) which are derived from the water vapor mixing ratio and ambient static temperature and pressure provided by the TAMMS instrument suite.
Description
These measurements were made using two separate DLH instruments installed on the NASA P-3B research aircraft, and the data from these instruments were combined to provide the best combination of accuracy, dynamic range, and data coverage.
The two DLH instruments are (1) the zenith-mounted system which utilizes an optical path between the zenith port and the aircraft’s vertical tail, and (2) the short-path system, which utilizes an optical path between two fuselage-mounted fins. This dataset was measured during the 2023 campaign of the Investigation of Microphysics and Precipitation for Atlantic Coast-Threatening Snowstorms (IMPACTS) Earth Venture Suborbital 3 project.
Read the rest (2 more)
IMPACTS was a three-year sequence of winter season deployments conducted to study snowstorms over the U.S. Atlantic Coast (2020-2023). The project aimed to (1) Provide observations critical to understanding the mechanisms of snowband formation, organization, and evolution; (2) Examine how the microphysical characteristics and likely growth mechanisms of snow particles vary across snowbands; and (3) Improve snowfall remote sensing interpretation and modeling to advance prediction capabilities significantly.
The DLH data files are available for flights from January 13, 2023, through February 28, 2023, and are in the ASCII format.
Links
Get the data
- IMPACTS Collection DOI doi.org/10.5067/impacts/data101 ↗
landing page · download · from NASA CMR, data nasa gov
- Resource doi.org/10.1029/2002jd003156 ↗
Calibration and data retrieval algorithms for the NASA Langley/Ames Diode Laser Hygrometer for the NASA Transport and Chemical Evolution Over the Pacific (TRACE-P) mission
documentation · download · from NASA CMR, data nasa gov
- IMPACTS-Related Publications eol.ucar.edu/node/15190/publications ↗
documentation · download · from NASA CMR, data nasa gov
- IMPACTS Micro Article ghrc.nsstc.nasa.gov/home/micro-articles/investigation-microphysics-and-precipitati… ↗
documentation · download · from NASA CMR, data nasa gov
- DLH IMPACTS User's Guide ghrc.earthdata.nasa.gov/browseui ↗
documentation · download · from NASA CMR, data nasa gov
- Original Metadata cmr.earthdata.nasa.gov/search/concepts/C3247876662-GHRC_DAAC.iso19115 ↗
download · from data nasa gov
- search.earthdata.nasa.gov /search/granules?p=C3247876662-GHRC_DAAC ↗
Earthdata Search allows users to search, discover, visualize, refine, and access NASA Earth Observation data.
download · from NASA CMR
- Resource ghrc.nsstc.nasa.gov/home/field-campaigns/impacts ↗
download · project · from data nasa gov, NASA CMR
Where it is published
- NASA Data Portal dataset page data.nasa.gov/dataset/diode-laser-hygrometer-dlh-impacts ↗
landing page · from data nasa gov
- DOI doi.org/10.5067/impacts/dlh/data101 ↗
DOI / persistent id · from NASA CMR
Catalogue records · 3
- CKAN API data.nasa.gov/api/3/action/package_show?id=ef6177e9-aee1-42e7-acc2-795ff3bee… ↗
metadata API · from data nasa gov
- CMR UMM-JSON cmr.earthdata.nasa.gov/search/concepts/C3247876662-GHRC_DAAC.umm_json ↗
metadata API · from NASA CMR
- CMR record cmr.earthdata.nasa.gov/search/concepts/C3247876662-GHRC_DAAC.html ↗
catalogue entry · from NASA CMR
Topics
- Stated by source
- Atmospheric Pressure · Diode Laser Hygrometer developed by NASA LaRC · Humidity Index · NASA P-3 · Water Vapor Indices
- From keywords
- Astronomy & Astrophysics · Earth & Environmental Science · Ocean & Atmospheric Science · Physics
- Inferred from text
- Satellite remote sensing 65%
Related
- Possibly the same asACHIEVE W-Band Cloud Radar IMPACTS
- Possibly the same asSBU X-band Phased Array Radar (SKYLER) IMPACTS
Provenance · 2 source records, 20 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| NASA Earthdata CMR | C3247876662-GHRC_DAAC | 8 d ago | JSON v1 |
| NASA Data Portal | ef6177e9-aee1-42e7-acc2-795ff3beedf8 | 5 d ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| access_level | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[field].local:field:astronomy | mapping · data nasa gov | connector:data_nasa_gov@1.0.0 | |
| concepts[field].local:field:earth-environmental | mapping · data nasa gov | connector:data_nasa_gov@1.0.0 | |
| concepts[field].local:field:ocean-atmospheric | mapping · data nasa gov | connector:data_nasa_gov@1.0.0 | |
| concepts[field].local:field:physics | mapping · data nasa gov | connector:data_nasa_gov@1.0.0 | |
| concepts[instrument].gcmd_instrument:dlh | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/atmosphere/atmospheric-pressure | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/atmosphere/atmospheric-water-vapor/water-vapor-indices | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/atmosphere/atmospheric-water-vapor/water-vapor-indices/humidity-index | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[modality].local:modality:remote-sensing | enrichment · NASA CMR | keyword-concept-rules@1.0.0 | title+description (65%) |
| concepts[platform].gcmd_platform:nasa-p-3 | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| created_date | source · data nasa gov | connector:data_nasa_gov@1.0.0 | |
| description | source · NASA CMR | connector:nasa_cmr@1.0.0 | /umm/Abstract |
| license_text | source · data nasa gov | connector:data_nasa_gov@1.0.0 | |
| publication_date | source · data nasa gov | connector:data_nasa_gov@1.0.0 | |
| spatial | source · NASA CMR | connector:nasa_cmr@1.0.0 | /umm/SpatialExtent |
| temporal | source · NASA CMR | connector:nasa_cmr@1.0.0 | /umm/TemporalExtents |
| title | source · NASA CMR | connector:nasa_cmr@1.0.0 | /umm/EntryTitle |
| updated_date | source · data nasa gov | connector:data_nasa_gov@1.0.0 | |
| version_label | source · NASA CMR | connector:nasa_cmr@1.0.0 |